Method of manufacturing a face with different thickness distribution

ABSTRACT

A method of manufacturing a face with different thickness distribution is cutting a slice metal board with predestination shape from a metal board and stamping the slice metal board into an uneven metal board with predestination shape of rough and uneven on it then, milling one side of the uneven metal board to produce a board with different thickness. The final step is pressing the metal board with different thickness to form a face with different thickness distribution.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a continuation-in-part of U.S. application Ser. No. 11/504,067 entitled METHOD OF MANUFACTURE A CUP FACE WITH DIFFERENT THICKNESS DISTRIBUTION filed on Aug. 15, 2006, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method of manufacture a golf head and more particularly to a method of manufacturing a face with different thickness distribution.

2. Description of the Related Art

In prior art, a face with different thickness distribution usually make of metal rod by forging and the pressure of the forging must be higher than 400 tons. The method will lose about 50% of the stuff. As a result of the crystals will change and reduce the strength of the material when the temperature is higher than 800° C., the manufacture temper must be controlled under 800° C. if manufacturer wants to use β titanium material to make the face. But, this will be difficult to make a metal rod into a face with the thickness between 1.5 to 4 mm by forging under the low manufacture temperature. The damnation of the face will be difficult to control. As know, there is a kind of face in cup shape. It will be more difficult to make a rod into a cup face with the thickness between 1.5 to 4 mm by forging under the low manufacture temper.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a method of manufacturing a face with different thickness distribution and the product is excellence in quality.

To achieve this object of the present invention, the method in present invention, comprising: cutting a slice metal board with predestination shape from a metal board (like β titanium material or maraging steel) and stamping the slice metal board into an uneven metal board with predestination shape of rough and uneven on it then, milling one side of the uneven metal board to produce a board with different thickness.

The advantage of present invention is using a board material to manufacture. The method of present invention loses about 20˜30% stuff and saves cost. By this method, there is no high-pressure machine needed and the cost of equipment can be saved. It is easy to control the thickness distribution by pressing a flat board first and then milling one side of it. The quality is excellent. There is one more bending step needed to from a cup face.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a board that cuts from the first step of the present invention;

FIG. 2 is a section view along the line 2-2 of the FIG. 1;

FIG. 3 is a front view of a board with rough and uneven in surface that presses in the b step of the present invention;

FIG. 4 is a section view along the line 4-4 of the FIG. 3;

FIG. 5 is a front view of a board with rough and uneven in surface that mills in the c step of present invention;

FIG. 6 is a section view along the line 6-6 of the FIG. 5;

FIG. 7 is a front view of a cup face in the d step of present invention;

FIG. 8 is a section view along the line 8-8 of the FIG. 6.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1 to 6, a method of manufacturing a face with different thickness distribution of present invention, comprising:

a) Cutting a slice metal board 10 with predestination shape (the unfold shape of the face) from a metal board (like β titanium material or maraging steel) as shows in FIG. 1 and FIG. 2.

b) Stamping the slice metal board 10 into an uneven metal board 20 with predestination shape of rough and uneven on it as shows in FIG. 3 and FIG. 4. In order to make the metal board become thinner, the metal board needs to be pressed on same side.

c) Milling one side of the uneven metal board 20 to produce a board with different thickness as shows in FIG. 5 and FIG. 6. This step mills the protruding side 21 of the uneven metal board 20 and makes the protruding side flat. This step makes the uneven metal board 20 become a metal board 30 with different thickness.

The step b is pressing the central portion of the metal board 20 as mark 23 on the Figs. to another side 22. The portion as mark 24 in the Figs. is almost flat. The rising portion 25 around the flat portion 24 protrudes to the side 21. The step c is milling the side 21 even with the central portion 23 as shows in FIG. 5 and FIG. 6. The central portion 23 keeps the original thickness of the board and the flat portion 24 mills partial thickness. The rising portion 25 mills most of the thickness and forms the thinnest portion. The most thickness of the central portion 23 forms the center portion of the face.

Present invention provides a simple cutting, stamping, milling and forging steps and makes a flat board to become a face with different thickness. The steps of present invention are simple and no more expensive equipment is needed. The method of present invention can operate in the low temperature without breaking the strength of the material. The product can be excellent in dimension and good quality. The method of present invention also saves stuff and cost.

Referring to FIG. 7 and FIG. 8, it shows the cup face in the second embodiment of present invention. The second embodiment follows the first embodiment, so the first three steps are the same. The difference between the first embodiment and the second embodiment is a step d that adds in the second embodiment. The step d is pressing the uneven metal board that makes from the step c into a cup shape as show in FIG. 7 and FIG. 8 to form a cup face 40 with different thickness distribution. Then, milling partial edge of the cup face 40 to from a protrudent portion 41 for the combination process. The most thickness of the central portion forms the center portion of the cup face. The metal board will be bended at the most thinnest rising portion 25 to form a cup shape. In order to form the protrudent portion 41, the edge portion 26 still keep the thickness of the metal board. 

1. A method of manufacturing a face with different thickness distribution, comprising: a) cutting a slice metal board with predestination shape from a metal board; b) stamping the slice metal board into an uneven metal board with predestination shape of rough and uneven on it; and c) milling one side of the uneven metal board to produce a board with different thickness.
 2. The method as claimed in claim 1, wherein the step b is pressing the central portion of the slice metal board of the step a to another side; the board forms a flat portion around the central portion and the portion around the flat portion protrudes to the other side and forms a rising portion.
 3. The method as claimed in claim 2, wherein the step c is milling the rising side of the uneven metal board of the step b even with the central portion.
 4. The method as claimed in claim 1, wherein the method including a step d, the step d is pressing the uneven metal board that makes from the step c into a cup shape to form a cup face with different thickness distribution. 